# Stefan Kaufman

> Polish engineer

**Wikidata**: [Q9345077](https://www.wikidata.org/wiki/Q9345077)  
**Source**: https://4ort.xyz/entity/stefan-kaufman-q9345077


## References

1. [BnF authorities](https://catalogue.bnf.fr/ark:/12148/cb16254503r)
2. Virtual International Authority File
3. Sejm-Wielki.pl